@article{oai:naragakuen.repo.nii.ac.jp:00000484,
 author = {藪下, 信 and Komori, Seiji and Yabushita, Shin and Komori, Seiji},
 journal = {情報学フォーラム, ‎Information Science Forum},
 month = {},
 note = {An investigation is made of the orbital deflection of an asteroid for a collision with the Earth to
be avoided. A set of equations are derived which describe the separation between the original
and deflected orbits and the equations are integrated from perihelion where a velocity change is
given in the direction of the orbital motion. For a predicted collision to be avoided, the
separation ought to be greater than the Earth radius at the time when the asteroid crosses the
Earth' orbit. It is found that if the lead time from perihelion is denoted by t measured in years,
the required velocity change is 0.22(t/10)-1 cm/sec for a (semi-major axis) =2 AU and
0.17(t/10)-1 cm/sec for a=3 AU for eccentricities greater than 0.7. These values are somewhat
less than the estimates obtained in earlier investigations.},
 pages = {1--7},
 title = {On the Deflection of the Orbits of Earth Colliding Asteroids},
 volume = {1},
 year = {2002},
 yomi = {ヤブシタ, シン}
}